Tuchel would have been the best coach for Chelsea but they missed him by sacking him. Chelsea does not have patience , they are always too fast to sack their coach .
You also don't need to judge Chelsea like that because the top officials at the Chelsea club also know how to make the team develop and become better in the hands of their new coach at this time. So just wait and see how the Chelsea team develops in the future because for now Chelsea has to fix everything that is needed so there is no need to judge how things are now. Due to the presence of a new coach into the squad
The arrival of a new coach will have an impact on the style of play, Chelsea also needs to equip Potter with great players to repeat the success that Tuchel has inscribed. Now is not the time to compare old coaches with new coaches, Potter has just taken charge of Chelsea and he needs time to build a Chelsea squad to get back to competing with elite clubs in the UCL. The presence of several new players is really needed by Potter, Chelsea must move in the transfer market to maintain the chance of surviving in the UCL all the way to the final.